URI-s play a fundamental role

• URI-s made the merge possible

• Anybody can create (meta)data on any resource on the Web

• • e.g., the same XHTML file could be annotated through other terms
  • semantics is added to existing Web resources via URI-s
  • URI-s make it possible to link (via properties) data with one another

• URI-s provide a syntax for naming and ground RDF into the Web

• • information can be retrieved using existing tools
  • this makes the “Semantic Web”, well… “Semantic Web ”